The same catalysts used in alkene hydrogenation—platinum, palladium, nickel, and rhodium—are utilized in the catalytic hydrogenation of alkynes. Step-by-step, hydrogenation creates an alkene first, which is then further hydrogenated to create an alkane.
How are alkenes created?
Elimination processes, which remove two atoms from adjacent carbon atoms to create a double bond, are typically used to create alkenes. Dehydration of alcohols, dehydrohalogenation of alkyl halides, and dehalogenation of alkanes are all steps in the preparation process.
What is an alkyne's end product?
Similar to alkenes, the major reaction route for alkynes is "addition," which entails rupturing the C-C bond and creating two new single bonds to carbon. Alkenes are the end product of addition reactions to alkynes, and as we just saw, addition reactions also occur in alkene reactions.
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